Question

A) What is acceleration? is the motion of a satellite around the earth with constant speed in circular orbit considered as accelerated motion? justify your answer.B) A bus is moving with a velocity of 90 km/h.its driver applies brakes due to which the bus retards uniformly at the rate of-2m/s and stop after covering certain distance.find the distance covered by the bus during retardation.

Answer 1

Hey!

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A) Acceleration is change in velocity per unit time.

Motion of satellite around the earth with a constant speed in circular orbit is accelerated motion but particularly motion is uniform circular motion. Though acceleration is 0 as satellite is moving with a constant speed.

B)
u= 90 km/h
a= -2m/s
v=0

2as= v^2 - u^2

2×-2×s= 0 - 25^2

-4s = -625

s= 625/4

s= 156.25

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Hope it helps...!!!